Formal Definition: Relational Algebra
{"Image DocumentName": "Formal Definition: Relational Algebra", "Image ImageDescription": "Let\u2019s assume that the numerator table T1 always consists of two columns A and B, and the denominator has only one B attribute. Then, the expression T1[A, B]/T2[B] is semantically equivalent to: T1[A, B]/T2[B] = T1[A] \u2013 ((T1[A] \u00d7 T2[B]) \u2013 T1[A, B])[A] 7/11/2009. Bazy i hurtownie danych.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}